rear lights wont work - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pphatbasstard · 11-19-2002, 01:58 AM

Im going crazy here!! My rear lights r not working at all not when u step on the break of just turn the lights on. I dissconnted the lights where they come thru the firewall and sent a shot of electricity down the wires and the lights work there so i know there is no short there or bad bulbs. And the fuse is not bad either. I dont know where the problem is.

If any u guys have any ideas or know of common problems on these trucks please let me know. Thanks

O'l Buck · 11-19-2002, 04:08 AM

How's the firewall plug look?...might be broken wires on the other side of the plug, dirty terminals, possibly a bad switch, but that wouldn't explain the brake lights not working.....maybe even a bad cab to frame ground.....30+ year old wiring is lots of fun......

pphatbasstard · 11-19-2002, 07:17 AM

nah i dont think it is that cuz like when i send 12 volts directly into the wires the lights come one.

any other thoughts?

chevy_fatman · 11-19-2002, 12:12 PM

I have the same problem with the rear lights in my truck, but not with the brake lights, when I turn the parking lights on, the rear lights work, but when I turn the headlights on, the taillights go off, I messed with the switch and found out that if I push it back in just a bit the rear lights come back on, sooo I suspect a bad switch in my truck, did you replace yours yet?

pphatbasstard · 11-20-2002, 02:30 AM

I got it fixed, kinda. I cleaned allll the contacts in my fues boz and got a new flasher. It all works now but when i turn on the pass. side turn light the right read break light goes out, but i am pretty sure that is a simple ground problem. But also now my dash lights all went out. I ran out of day light to get that done today so i will get on that one tomorrow.

Longhorn Man · 11-21-2002, 12:46 AM

The turn signal problem you describe now is common.
The turn signal switch needs replaced.

11-19-2002, 01:58 AM	#1
pphatbasstard Registered User Join Date: Oct 2002 Posts: 166	rear lights wont work Im going crazy here!! My rear lights r not working at all not when u step on the break of just turn the lights on. I dissconnted the lights where they come thru the firewall and sent a shot of electricity down the wires and the lights work there so i know there is no short there or bad bulbs. And the fuse is not bad either. I dont know where the problem is. If any u guys have any ideas or know of common problems on these trucks please let me know. Thanks

11-19-2002, 04:08 AM	#2
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	How's the firewall plug look?...might be broken wires on the other side of the plug, dirty terminals, possibly a bad switch, but that wouldn't explain the brake lights not working.....maybe even a bad cab to frame ground.....30+ year old wiring is lots of fun...... __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

11-19-2002, 12:12 PM	#4
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,621	LIGHTS I have the same problem with the rear lights in my truck, but not with the brake lights, when I turn the parking lights on, the rear lights work, but when I turn the headlights on, the taillights go off, I messed with the switch and found out that if I push it back in just a bit the rear lights come back on, sooo I suspect a bad switch in my truck, did you replace yours yet? __________________ Paul How do you make the invisible, visible?.........You take it away.

11-19-2002, 07:17 AM	#3
pphatbasstard Registered User Join Date: Oct 2002 Posts: 166	nah i dont think it is that cuz like when i send 12 volts directly into the wires the lights come one. any other thoughts?

11-20-2002, 02:30 AM	#5
pphatbasstard Registered User Join Date: Oct 2002 Posts: 166	I got it fixed, kinda. I cleaned allll the contacts in my fues boz and got a new flasher. It all works now but when i turn on the pass. side turn light the right read break light goes out, but i am pretty sure that is a simple ground problem. But also now my dash lights all went out. I ran out of day light to get that done today so i will get on that one tomorrow.

11-21-2002, 12:46 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The turn signal problem you describe now is common. The turn signal switch needs replaced.



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